1180536815661 has 16 divisors (see below), whose sum is σ = 1798942629888. Its totient is φ = 674581446000.

The previous prime is 1180536815561. The next prime is 1180536815701. The reversal of 1180536815661 is 1665186350811.

It is not a de Polignac number, because 1180536815661 - 2¹⁰ = 1180536814637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1180536815561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 958776 + ... + 1811166.

It is an arithmetic number, because the mean of its divisors is an integer number (112433914368).

Almost surely, 2^{1180536815661} is an apocalyptic number.

It is an amenable number.

1180536815661 is a deficient number, since it is larger than the sum of its proper divisors (618405814227).

1180536815661 is an equidigital number, since it uses as much as digits as its factorization.

1180536815661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918352.

The product of its (nonzero) digits is 1036800, while the sum is 51.

The spelling of 1180536815661 in words is "one trillion, one hundred eighty billion, five hundred thirty-six million, eight hundred fifteen thousand, six hundred sixty-one".